One detail is missing, the configuration is incomplete as is. If you had built Image, then this does more than build Image…it also propagates the configuration to other parts of the code. Without that your config will not match (the config will be there, but it won’t have been applied). Since you did not build Image, can you start over, but this time, after you’ve modified the config with the editor, and prior to building modules, you must do this (building Image does this for you):
make O=kernel_out modules_prepare
(you will have to probably start over to be certain; I recommend that you delete “kernel_out/” and start over just to be certain, along with the same for old output in modules_out/)
If you still see an issue, then there might have been an automatic insert of a “+” in the config name. If and only if this is the case, then see:
https://forums.developer.nvidia.com/t/jetson-nano-no-display-from-hdmi/248228/10